| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide an optical glass rod with antireflection films that secures a necessary length without being limited to a rod length short enough for storage in a vacuum deposition machine for forming antireflection films. <P>SOLUTION: An optical glass rod 6 having antireflection films 6a on both end surfaces is arranged on an optical path of a laser resonator comprising a rear mirror and a front mirror so as to make an optical optical-path length long. The optical glass rod 6 comprises a main-body member 6b and a pair of end portion members 6c whose overall length is shorter than that of the main-body member 6b and which each have an antireflection film 6a on one end surface, and both end surfaces of the end portion members 6c are bonded to both end surfaces of the main-body member 6b in optical contact. Consequently, even when the optical glass rod 6 needs to be too long to be stored in a general vacuum deposition machine, the optical rod 6 can be manufactured which has the antireflection films 6a on both the ends. <P>COPYRIGHT: (C)2012,JPO&INPIT |
